The tendency to lose things is biologically based. People don't want to lose things but some people definitely have more troubles with organization and losing things than others. For instances, adults and kids with ADHD often suffer from the "losing disorder." Punishment is not particularly helpful this issue. Rather, finding ways to compensate for the tendency is often more practical. Learning tricks and acquiring tools can help - many of which are available in the ADHD literature. Fo instance key finders are great for metal items such as keys and cell phones. Parents can work with their children's teachers to develop strategies and organizational processes - leaving things to chance will result in a lot of lost and forgotten items. Your child needs encouragement and tools - not reprimands. Treat his behavior as a disability and address it with compassion and practical solutions.  Sarah Chana